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/* $OpenBSD: dev.h,v 1.28 2011/05/26 07:18:40 ratchov Exp $ */
/*
* Copyright (c) 2008 Alexandre Ratchov <alex@caoua.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef DEV_H
#define DEV_H
#include "aparams.h"
struct aproc;
struct abuf;
struct dev {
struct dev *next;
/*
* desired parameters
*/
unsigned reqmode; /* mode */
struct aparams reqipar, reqopar; /* parameters */
unsigned reqbufsz; /* buffer size */
unsigned reqround; /* block size */
unsigned reqrate; /* sample rate */
unsigned hold; /* hold the device open ? */
unsigned autovol; /* auto adjust playvol ? */
unsigned refcnt; /* number of openers */
#define DEV_CLOSED 0 /* closed */
#define DEV_INIT 1 /* stopped */
#define DEV_START 2 /* ready to start */
#define DEV_RUN 3 /* started */
unsigned pstate; /* on of DEV_xxx */
char *path; /* sio path */
/*
* actual parameters and runtime state (i.e. once opened)
*/
unsigned mode; /* bitmap of MODE_xxx */
unsigned bufsz, round, rate;
struct aparams ipar, opar;
struct aproc *mix, *sub, *submon;
struct aproc *rec, *play, *mon;
struct aproc *midi;
};
extern struct dev *dev_list;
int dev_run(struct dev *);
int dev_ref(struct dev *);
void dev_unref(struct dev *);
void dev_del(struct dev *);
void dev_wakeup(struct dev *);
void dev_drain(struct dev *);
struct dev *dev_new_thru(void);
struct dev *dev_new_loop(struct aparams *, struct aparams *, unsigned);
struct dev *dev_new_sio(char *, unsigned,
struct aparams *, struct aparams *,
unsigned, unsigned, unsigned, unsigned);
int dev_thruadd(struct dev *, char *, int, int);
void dev_midiattach(struct dev *, struct abuf *, struct abuf *);
unsigned dev_roundof(struct dev *, unsigned);
int dev_getpos(struct dev *);
void dev_attach(struct dev *, char *, unsigned,
struct abuf *, struct aparams *, unsigned,
struct abuf *, struct aparams *, unsigned,
unsigned, int);
void dev_setvol(struct dev *, struct abuf *, int);
#endif /* !define(DEV_H) */
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